condition mean min max 4 h after light 2786.5 2786.5 2786.5 8 h after light 2398.8 2209.0 2588.6 12 h after light 1547.6 1277.8 1817.4 4 h after dark 1424.7 1020.1 1829.3 8 h after dark 1772.0 1464.3 2079.7 12 h after dark 2229.8 1811.1 2648.5